Influence of Diuretic-Induced Dehydration on Competitive Sprint and Power Performance

• DOI: 10.1249/01.mss.0000170100.93279.be
• Publication Date: 2005-12-12T19:57:51Z
• Authors: GREIG WATSON; DANIEL A. JUDELSON; LAWRENCE E. ARMST...; SUSAN W. YEARGIN; DOUGLAS J. CASA; CARL M. MARESH
• Keywords: Sprint; Vertical jump

Diuretic-induced dehydration impairs prolonged running performance (> 1500 m). Sprinting may suffer by similar mechanisms (i.e., altered cardiovascular strain, heat storage, and metabolism) or improve because of reduced mass to accelerate carry.To examine sprint power after diuretic-induced dehydration.After six practice sessions, nine male former sprinters (mean +/- SD; age, 21 2 yr; body (BM), 80.0 5.2 kg; height, 1.78 0.08 m; fat, 14 4%) participated in a 50-m race, 200-m 400-m vertical jump on an indoor synthetic track, once when dehydrated (40-mg furosemide; DD) with no diuretic (CON) using counter-balanced crossover design. Plasma volume change (%deltaPV), heart rate (HR), blood pressure, rectal temperature, serum electrolytes, plasma lactate, glucose, rating perceived exertion, thirst, thermal sensations were measured before each race.Sprint times (DD vs CON) for the 50 m (6.72 0.28 6.73 0.29 s), 200 (25.95 1.20 26.21 1.42 400 (59.01 4.26 58.68 3.68 s) both conditions, as was height (0.67 0.10 0.66 0.11 This occurred despite losing 2.2 0.4% BM 7.3 6.7%deltaPV (50/200 m) 2.5 7.1 2.7% deltaPV (VJ/400 response DD.Diuretic-induced not detrimental performance. Metabolic, thermoregulatory, variables significantly DD. Furthermore, theoretical benefit reduction) supported this subject cohort.